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Updates every hour. Last Updated: 29-Dec-2025 07:11 ET (29-Dec-2025 12:11 GMT/UTC)
A carbon dioxide energy storage system with high-temperature graded heat storage structure: Thermodynamic intrinsic cycle construction and performance analysis
Shanghai Jiao Tong University Journal CenterCarbon dioxide energy storage (CES) is an emerging compressed gas energy storage technology which offers high energy storage efficiency, flexibility in location, and low overall costs. This study focuses on a CES system that incorporates a high-temperature graded heat storage structure, utilizing multiple heat exchange working fluids. Unlike traditional CES systems that utilize a single thermal storage at low to medium temperatures, this system significantly optimizes the heat transfer performance of the system, thereby improving its cycle efficiency. Under typical design conditions, the round-trip efficiency of the system is found to be 76.4%, with an output power of 334 kW/(kg·s−1) per unit mass flow rate, through mathematical modeling. Performance analysis shows that increasing the total pressure ratio, reducing the heat transfer temperature difference, improving the heat exchanger efficiency, and lowering the ambient temperature can enhance cycle efficiency. Additionally, this paper proposes a universal and theoretical CES thermodynamic intrinsic cycle construction method and performance prediction evaluation method for CES systems, providing a more standardized and accurate approach for optimizing CES system design.
- Journal
- Frontiers in Energy
Boron‑insertion‑induced lattice engineering of Rh nanocrystals toward enhanced electrocatalytic conversion of nitric oxide to ammonia
Shanghai Jiao Tong University Journal CenterElectrocatalytic nitric oxide (NO) reduction reaction (NORR) is a promising and sustainable process that can simultaneously realize green ammonia (NH3) synthesis and hazardous NO removal. However, current NORR performances are far from practical needs due to the lack of efficient electrocatalysts. Engineering the lattice of metal-based nanomaterials via phase control has emerged as an effective strategy to modulate their intrinsic electrocatalytic properties. Herein, we realize boron (B)-insertion-induced phase regulation of rhodium (Rh) nanocrystals to obtain amorphous Rh4B nanoparticles (NPs) and hexagonal close-packed (hcp) RhB NPs through a facile wet-chemical method. A high Faradaic efficiency (92.1 ± 1.2%) and NH3 yield rate (629.5 ± 11.0 µmol h−1 cm−2) are achieved over hcp RhB NPs, far superior to those of most reported NORR nanocatalysts. In situ spectro-electrochemical analysis and density functional theory simulations reveal that the excellent electrocatalytic performances of hcp RhB NPs are attributed to the upshift of d-band center, enhanced NO adsorption/activation profile, and greatly reduced energy barrier of the rate-determining step. A demonstrative Zn–NO battery is assembled using hcp RhB NPs as the cathode and delivers a peak power density of 4.33 mW cm−2, realizing simultaneous NO removal, NH3 synthesis, and electricity output.
- Journal
- Nano-Micro Letters
Turning farm waste into climate solutions
Biochar Editorial Office, Shenyang Agricultural University- Journal
- Biochar
Gender-based violence impairs survivors’ verbal memory and causes greater mental effort to recognize words
University of Granada- Journal
- Journal of Interpersonal Violence
ResNet-Based system offers new tool for power grid icing risk assessment
Maximum Academic PressA research team has developed a deep learning-based model that can accurately identify wire icing risk levels from image data, providing a powerful alternative to conventional observation methods.
- Journal
- Emergency Management Science and Technology
New analytical model reveals two-speed progress toward the Sustainable Development Goals in the European Union
Universidad Miguel Hernandez de ElcheUsing EUROSTAT data and double randomization, the co-led study improves the Benefit of the Doubt model through a novel Ensemble-DEA framework that mitigates the curse of dimensionality in SDG indicators. Published in Expert Systems with Applications, the method offers more reliable EU performance rankings and benchmarking tools for evaluating sustainability policies across member states.
- Journal
- Expert Systems with Applications
- Funder
- National Science Centre of Poland
Revolutionizing urban deliveries: Decoding user acceptance for drones and robots in a sustainable future
Beijing Institute of Technology Press Co., Ltd- Journal
- Green Energy and Intelligent Transportation
Identification of critical states in complex biological systems using cell-specific causal network entropy
Research- Journal
- Research
- Funder
- National Natural Science Foundation of China, Educational Commission of Guangdong Province, Guangdong Provincial Key Laboratory of Mathematical and Neural Dynamical Systems, Natural Science Foundation of Guangdong Province, National Training Program of Innovation and Entrepreneurship for Undergraduates
Magnetic hydrochar: A new hero in water purification
Biochar Editorial Office, Shenyang Agricultural UniversityIn a significant stride towards cleaner water, researchers at the School of Resources and Environment, Northeast Agricultural University, Harbin, China, have developed a novel material that effectively removes harmful pollutants from water. Professors Jianhua Qu and Ying Zhang lead the team behind the study titled "Synthesis of Polyvinyl Chloride Modified Magnetic Hydrochar for Effective Removal of Pb(II) and Bisphenol A from Aqueous Phase: Performance and Mechanism Exploration." This innovative research introduces a powerful new tool in the fight against water pollution.
- Journal
- Carbon Research